Methods and systems for objects supporting structured language persistent state

• US 7,543,226 B2
• Filed: 09/27/2004
• Issued: 06/02/2009
• Est. Priority Date: 07/14/1997
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Mantek, Frank, Francis, James Lee, Little, Robert A., Layman, Andrew J., Apfel, Darren A.
• Primary Examiner(s): Hong; Stephen S
• Assistant Examiner(s): Faber; David
• Application Number:
  US10/951,834
• Publication Number:
  US 20050055679A1
• Time in Patent Office: 1,709 Days
• Field of Search: 715/200, 715/209, 715/221, 715/234, 715248-249, 715/255
• US Class Current: 715/234
• CPC Class Codes: G06F 16/258 Data format conversion from or to a database
• CPC Class Codes: G06F 40/143 Markup, e.g. Standard Generalized Markup Language [SGML] or Document Type Definition [DTD]
• CPC Class Codes: G06F 40/151 Transformation

Abstract

A programming object can comprise an executable method for loading a state of the object and an executable method for saving the object'"'"'s state. The programming object can be an instance of a programmer-defined class. The executable method of the object for loading the state of the object can load the object'"'"'s state as markup language text, and the executable method of the object for saving the object'"'"'s state can save the object'"'"'s state as markup language text.

Claims

1. One or more computer-readable media, having encoded thereon a persistent state of an object, the object having a member function invocable to load one or more properties of the object from markup language text;

wherein the object is an instance of a class exhibiting characteristics of data encapsulation, polymorphism, or inheritance;

wherein the object is embeddable with other objects in a displayed document;

wherein the object is embeddable with other objects in a document displayed for editing and is configured to be altered when the document is displayed for editing;

wherein the persistent state comprises the markup language text;

wherein the properties of the object are settable from the markup language text of the persistent state;

wherein the object comprises an interface for loading and saving the persistent state, the interface comprising;

an executable member function for generating the markup language text of the persistent state;

an executable member function for restoring the object from the markup language text of the persistent state;

wherein the object is an instance of a class and exposes its functionality to client programs that utilize the object; and

wherein the interface for loading and saving the persistent state is a group of semantically related member functions of the object.

2. The one or more computer-readable media of claim 1 wherein the persistent state comprises a class identifier chosen according to the following method:

selecting a markup language tag component of a markup language element;

finding the markup language tag component in an entry of a data structure having entries associating a markup language element characteristic with a class identifier; and

storing the class identifier of the found entry in the persistent state of an object.

3. The one or more computer-readable media of claim 1 wherein the markup language text is a stream of markup language text.

4. The one or more computer-readable media of claim 1 wherein the persistent state comprises an indication of a class identifier indicating a class of the object.

5. The one or more computer-readable media of claim 1 wherein the markup language text comprises structured language text.

6. A method for persisting a programming object, the method comprising:

embedding the programming object with other objects in a document displayed for editing, wherein the programming object comprises an interface for loading and saving a state of the programming object, the interface comprising an executable member function for generating a markup language text persisted state of the programming object in markup language text and an executable member function for restoring the object from the markup language text persisted state, wherein the programming object is an instance of a class and exposes its functionality to client programs that utilize the object, and wherein the interface for loading and saving the object'"'"'s state is a group of semantically related member functions of the object;

receiving alterations to the state of the programming object when the document is displayed for editing, wherein the alterations result in an altered state;

invoking the programming object'"'"'s executable member function for generating the markup language text persisted state of the programming object;

responsive to invocation of the executable member function for generating the markup language text persisted state of the programming object, generating a stream of markup language text representing the altered state of the programming object, wherein the stream of markup language text is sufficient to restore the programming object to the altered state.

7. The method of claim 6 wherein the markup language text comprises structured language text.

15. The method of claim 6 further comprising:

responsive to determining that the programming object has come into view in the document for presentation to the user, instantiating the programming object and setting properties of the programming object based on a persisted markup language text state of the object.

8. In one or more computer-readable media, a programming object comprising:

an interface for loading and saving the object'"'"'s state;

wherein the interface comprises;

an executable member function for generating a markup language text persisted state of the programming object in markup language text; and

an executable member function for restoring the object from the markup language text persisted state;

wherein the programming object is an instance of a class and exposes its functionality to client programs that utilize the object;

wherein the interface for loading and saving the object'"'"'s state is a group of semantically related member functions of the object.

9. The computer-readable medium of claim 8 wherein the markup language text comprises structured language.

17. The one or more computer-readable media of claim 8, wherein the programming object is an instance of a programmer-defined class, wherein the programming object is embeddable with other objects in a displayed document, and wherein the programming object is embeddable with other objects in a document displayed for editing and is configurable to be altered when the document is displayed for editing.

18. The one or more computer-readable media of claim 8, wherein the markup language text comprises a form element.

19. The one or more computer-readable media of claim 8, wherein the markup language text comprises structured language text.

20. The one or more computer-readable media of claim 8, wherein the markup language text comprises hypertext markup language text.

21. The one or more computer-readable media of claim 8, wherein the markup language text consists of structured language text.

10. A computer-readable medium having stored thereon a data structure comprising:

a first data field comprising a markup language tag component; and

a second data field comprising a class identifier of a programming object associated with the first data field, whereby an object of the class identifier is configured to be rendered to represent a markup language element comprising the markup language tag component of the first data field;

wherein the programming object is embeddable with other objects in a displayed document;

wherein the programming object is embeddable with other objects in a document displayed for editing and is configured to be altered when the document is displayed for editing;

wherein the programming object comprises an interface, the interface comprising;

an executable member function for generating a markup language text persisted state of the programming object in markup language text; and

an executable member function for restoring the object from the markup language text persisted state;

wherein the programming object is an instance of a class and exposes its functionality to client programs that utilize the object;

wherein the interface for 1oadin; and

saving the object'"'"'s state is a group of semantically related member functions of the object.

11. The computer-readable medium of claim 10 wherein the first data field of the data structure stored thereon comprises a form element name.

12. A computer-readable medium having stored thereon a data structure, comprising:

a first data field comprising a markup language element characteristic; and

a second data field comprising an embeddable object property identifier of a programming object, the property identifier chosen with reference to the first data field;

wherein the programming object is embeddable with other objects in a displayed document;

wherein the programming object is embeddable with other objects in a document displayed for editing and is configured to be altered when the document is displayed for editing;

wherein the programming object comprises an interface, the interface comprising;

an executable member function for generating a markup language text persisted state of the programming object in markup language text;

an executable member function for restoring the object from the markup language text persisted state;

wherein the programming object is an instance of a class and exposes its functionality to client programs that utilize the object; and

wherein the interface for loading and saving the object'"'"'s state is a group of semantically related member functions of the object.

13. The computer-readable medium of claim 12 wherein the first data field of the data structure stored thereon comprises an attribute keyword.

14. The computer-readable medium of claim 13 wherein the second data field of the data structure stored thereon comprises a dispatch identifier.

16. A method of processing a state of a programming object, the method comprising:

responsive to a call on an executable method of the programming object and providing markup language text representing the state of the object as input, setting the state of the object according to the markup language text, wherein the state of the object comprises a property of the object;

displaying the programming object as embedded in a document with other objects and as having the state of the object according to the markup language text;

receiving an alteration to the property of the object while the object is displayed in a document for editing, whereby the state of the object is altered to an altered state;

responsive to a call on an other executable method of the programming object, outputting the altered state of the object as markup language text, wherein the altered state of the object comprises the property of the object as altered while displayed;

wherein the programming object comprises an interface, the interface comprising;

an executable member function for generating the markup language text;

an executable member function for setting the state of the object from the markup language text;

wherein the programming object is an instance of a class and exposes its functionality to client programs that utilize the object; and

wherein the interface is a group of semantically related member functions of the object.